“Yes,” chuckled the old man. “That is the Cathedral of Amiens.”

The architect effaced the picture on the sand, and produced another.

“Metz,” said the old man.

He made yet another effort.

“Antwerp!”

“O my master,” said the despairing architect, “you mock me. Produce a design for me yourself.”

“On one condition.”

“Name it.”

“You shall give me yourself, soul and body!”

The affrighted architect began to say his prayers, and the old man suddenly disappeared.